What is Hubble telescope?
Give a picture that is took with the help of this telescope.
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Hubble telescope is used to get better view of objects in space and discover far away places in space, which can't be done with ground telescope.
Hubble Space Telescope was launched by NASA In 1990, and is still functioning.
Hubble Space Telescope was launched by NASA In 1990, and is still functioning.
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The Hubble Space Telescope (HST), or simply Hubble, is a telescope that orbits outside the atmosphere, in circular orbit around the Earth at 593 km above sea level, with an orbital period between 96 and 97 min. Named in this way in honor of the astronomer Edwin Hubble, it was put into orbit on April 24, 1990 on the STS-31 mission and as a joint project of NASA and the European Space Agency inaugurating the Great Observatories program.
The telescope can obtain images with an optical resolution greater than 0.1 seconds of arc.
The advantage of having a telescope beyond the distortion produced by the Earth's atmosphere is essentially that in this way the effects of atmospheric turbulence can be eliminated.
In addition, the atmosphere strongly absorbs electromagnetic radiation at certain wavelengths, especially in the infrared, reducing the quality of the images and precluding the acquisition of spectra in certain bands characterized by the absorption of the Earth's atmosphere.
Terrestrial telescopes are also affected by meteorological factors (presence of clouds) and light pollution caused by large urban settlements, which reduces the possibility of locating terrestrial telescopes.
One of the characteristics of the HST was the possibility of being visited by astronauts in the so-called service missions (SM). During the service missions they could fix damaged items, install new instruments and raise the orbit of the telescope.
Five service missions were performed (SM1, SM2, SM3A, SM3B and SM4). The last one took place in May 2009 and there was the most drastic improvement in the HST instrument capacity, with the installation of two new instruments (WFC3 and COS), two other repairs (ACS and STIS) and a further improvement (FGS) .
The telescope can obtain images with an optical resolution greater than 0.1 seconds of arc.
The advantage of having a telescope beyond the distortion produced by the Earth's atmosphere is essentially that in this way the effects of atmospheric turbulence can be eliminated.
In addition, the atmosphere strongly absorbs electromagnetic radiation at certain wavelengths, especially in the infrared, reducing the quality of the images and precluding the acquisition of spectra in certain bands characterized by the absorption of the Earth's atmosphere.
Terrestrial telescopes are also affected by meteorological factors (presence of clouds) and light pollution caused by large urban settlements, which reduces the possibility of locating terrestrial telescopes.
One of the characteristics of the HST was the possibility of being visited by astronauts in the so-called service missions (SM). During the service missions they could fix damaged items, install new instruments and raise the orbit of the telescope.
Five service missions were performed (SM1, SM2, SM3A, SM3B and SM4). The last one took place in May 2009 and there was the most drastic improvement in the HST instrument capacity, with the installation of two new instruments (WFC3 and COS), two other repairs (ACS and STIS) and a further improvement (FGS) .
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